Automatic eibe-alakm mechanism



J. J RUBENS.

AUTOMATIC HRE ALARM MECHANISM.

APPLICATION FILED DEC. H, 1915.

1,1 93,720. Patented Aug. 8,1916.

ATTORNEY ILLINOIS.

AUTOMATIC FIRE-ALARM MECHANISM.

Specification of Letters Patent.

Patented Aug. 8, 1916.

Application filed. December 11, 1915. Serial No. 66,349.

To all whom it may concern:

Be it known that I, JULIUS J. Romans, a citizen of the United States, and a residentof Aurora, in the county of Kane and State of Illinois, have invented certain new and useful Improvements in Automatic Fire- Alarm Mechanism, of which the following is a specification.

My invention relates to automatic fire alarm mechanism, and particularly to that class in which alarm mechanism is prevented from sounding by a heat fusible element, the element yielding or melting when subjected to the heat of a fire and then permitting sounding of the alarm.

The alarm mechanism of my invention is very simple and applicable in any position, and inexpensive so that it can be used by anyone for automatically warning in case of fire.

On the accompanying drawings I have shown a device which embodies the features of my invention.

In these drawings Figure 1 is a side elevational view of an alarm device in which the alarm mechanism is in the form of a spring wound bell, Fig. 2 is a plan view with the bell cover removed, and Fig. 3 is an end view.

In the device shown the supporting base 5 has its end 6 turned at right angles to threadedly receive a screw 7. Secured to the other end of the base 5 I have shown an ordinary bicycle bell B having the Winding stem 8 on which is secured the cover 9 in the form of a bell and which cover also forms a handle for turning the stem to wind the bell mechanism. The bell is of usual construction, the various gears 10 being connected with a main spring, which it is not necessary to show. A star wheel 11 is adapted to be driven by the gearing and in turn effects vibration of an escapement member 12 pivoted on pin 13, this escapement member supporting an arm 1& terminating in the weight 15. lVhen the escapement member 12 is vibrated the weight 15 will strike the bell cover 9 and the bell will sound.

A spring 16 is provided in the bell housing and terminates in tongue 17 and the spring tends to hold the tongue away from the striker arm 14 to permit vibration of the escapement member 12. Adjacent the bell awakened and locate the fire.

the base 5 has the extension 18 parallel with the end 6 and passing through this exten sion is a bar 19 which projects through the bell housing and against the tongue 17. The head 20 of the bar 19 has the pocket 21 and the screw 7 has the pocket 22 in its end and supported in these pockets is a length 23 of fusible material. This heat fusible material length is inserted in the pockets between the bar 19 and the screw 7 and the screw is then tightened to cause the bar 19 to be shifted inwardly to force the tongue 17 against the striker arm 14: to prevent ringing of the bell. With this adjustment the device is ready for use and is supported at any desired location in a building so that when a fire occurs the heat will weaken the fusible length 23 or will melt it, and the pressure against the bar 19 being thus removed the spring 16 will be free to shift its tongue 17 away from the striker mechanism of the bell and the bell will sound an alarm and will keep on ringing until the occupants of the building are If desired, vent holes 24 may be provided in the base 5 in line with the fusible length to permit ventilation.

In Fig. 3 I have shown a convenient arrangement for supporting the device from a hook, nail, or other support. The end of the base has the out-standing legs 25 and 26 on which is supported a wire loop 27 for receiving the nail, hook or other support, the loop being at right angles to the base in order that when it is hung over a nail driven in a side wall of a building the base will stand out at right angles to the wall.

I do not of course desire to be limited to the exact construction and arrangement shown as changes and modifications may be possible which would still come within the scope of the appended claim which is the following:

In an automatic fire alarm device, the combination of a supporting base having one end turned at right angles thereto and an abutment screw threading through said end, a spring wound alarm bell secured at the other end of said base, a detent tongue within the bell and a spring tending to hold said tongue away from the alarm mechanism to permit sounding of the bell, an intermediate extension from said base and a bar slidable therein and extended into the bell in en gagement With said spring actuated deteut tongue, and a length of fusible material inserted between said abutment screw and bar and adapted When said screw is adjusted topress said bar against the detent tongue to cause said tongue to lock the alarm mechanism against actuation, fusing of said length releasing said bar to allow the tongue to re lease the alarm mechanism. 1)

In Witness whereof I hereunto subscribe my name this 6th day of December, A. D.

JULIUS J. RUBENS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

